package ioperations;

import book.Book;
import book.BookList;

import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: liangyuanzhang
 * Date: 2025-3-01
 * Time: 19:13
 */
public class DelOperation implements IOPeration{
    public void work(BookList bookList){
        System.out.println("删除图书......");

        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入要删除的图书:");
        String name = scanner.nextLine();

        int currentSize = bookList.getUsedSize();

        int pos = -1;
        int i = 0;
        //找到这本书
        for (i = 0; i < currentSize; i++) {
                Book book = bookList.getBook(i);
                if(book.getName().equals(name)){
                    System.out.println("找到了这本书:");
                    pos = i;
                    break;
            }
        }
        if (i == currentSize){
            System.out.println("没有你要删除的书!w");
            return;
        }

        //这里开始删除
        for (int j = pos; j < currentSize-1; j++) {
            //bookList[j] = bookList[j+1];
            Book book = bookList.getBook(j+1);

            bookList.setBooks(j,book);

        }
        bookList.setBooks(currentSize-1,null);
        bookList.setUsedSize(currentSize-1);
        System.out.println("删除成功!");
    }
}
